Posted
by
timothy
on Monday June 20, 2011 @05:53PM
from the you-look-like-this dept.

ptresset writes with a snippet from Wired: "Pop along to the Tenderpixel art space in Soho this month, and you could grab a drawing of your mug, sketched by one of Patrick Tresset's robotic arms. The sketching bot is called Paul. It starts off the exhibition by scanning the room and looking for people with its motorised eye. When it spots a human face, it uses an edge detection technique called Gabor filter (which is modeled after cells in a human's visual cortex) to pick out the salient lines."

It's unclear from the article exactly what processing goes on to get to the sketch, but if plain Gabor filters were actually used for edge detection, the result might not be that good. Phase congruency [uwa.edu.au] is a measure that uses Gabor filters to produce a pretty good edge detection result. Posting as anon so I don't look like a know-it-all; I'm not affiliated with Peter Kovesi, either.